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(西安建筑科技大學(xué)結(jié)構(gòu)工程與抗震教育部重點(diǎn)實(shí)驗(yàn)室，西安 710055)
［摘要］根據(jù)型鋼混凝土(SRC)框架結(jié)構(gòu)的特點(diǎn)，將其性能劃分為基本完好、輕微損壞、中等破壞和防止倒塌四個(gè)水平，并用層間位移角限值予以量化；將SRC多自由度體系轉(zhuǎn)化為等效單自由度體系，導(dǎo)出了相應(yīng)的等效參數(shù)，并根據(jù)其性能水平確定出結(jié)構(gòu)的目標(biāo)位移。在此基礎(chǔ)上，提出SRC框架結(jié)構(gòu)基于位移的設(shè)計(jì)步驟，并依此對(duì)結(jié)構(gòu)進(jìn)行承載力設(shè)計(jì)，用靜力彈塑性分析方法對(duì)所設(shè)計(jì)的SRC規(guī)則框架結(jié)構(gòu)進(jìn)行推覆分析，校核結(jié)構(gòu)的側(cè)移形狀與初始設(shè)計(jì)側(cè)移曲線是否一致，在不滿足變形需求時(shí)，用推覆至該性能水平時(shí)的側(cè)移曲線作為修正后的側(cè)移曲線重新計(jì)算。算例分析表明，文中方法簡(jiǎn)便實(shí)用、結(jié)果精確，能夠?qū)崿F(xiàn)SRC框架結(jié)構(gòu)基于位移抗震設(shè)計(jì)的目的。
［關(guān)鍵詞］型鋼混凝土框架結(jié)構(gòu)；基于位移；性能水平；靜力彈塑性分析
Research on displacement-based design method of steel reinforced concrete frame structures
Shi Qingxuan, Wang Qiuwei, Lei Jian(Key Laboratory of Structural Engineering and Earthquake Resistant, Ministry of Education, Xi’an University of Architecture & Technology, Xi’an 710055，China)
Abstract:The seismic performance of steel reinforced concrete (SRC) frames is divided into four levels which are basically well, slight destruction, secondary destruction and collapse prevention according to their characteristics, and the four levels are quantified with storey drift angle. The SRC multi-degree-of-freedom system is transformed into an equivalent single-degree-offreedom system and the corresponding parameters are derived, and the target displacement is also determined according to the corresponding performance levels. The displacement-based seismic design procedure of SRC structures is put forward, by which one regular SRC building is analyzed using Pushover analysis method, and the pushover drift curve is taken as the modified drift shape and the structure should be redesigned if the deformation resistance is insufficient. At last the numerical example shows that the method is accurate enough to achieve the aim of displacement-based seismic design of SRC structures.
Keywords:steel reinforced concrete frame structures; displacement-based; seismic performance levels; Pushover analysis
*高等學(xué)校博士學(xué)科點(diǎn)專項(xiàng)科研基金批準(zhǔn)項(xiàng)目(20060703008)。
作者簡(jiǎn)介：史慶軒，教授，博導(dǎo)，Email：qingxuanshi@sina.com。
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